TY - JOUR AU - JACK A. THORNE TI - Raising the level for $\def \xmlpi #1{}\def \mathsfbi #1{\boldsymbol {\mathsf {#1}}}\let \le =\leqslant \let \leq =\leqslant \let \ge =\geqslant \let \geq =\geqslant \def \Pr {\mathit {Pr}}\def \Fr {\mathit {Fr}}\def \Rey {\mathit {Re}}\text {GL}_{{n}}$ JO - Forum of Mathematics, Sigma PY - 2014 VL - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1017/fms.2014.14/ DO - 10.1017/fms.2014.14 LA - en ID - 10_1017_fms_2014_14 ER -